CN110340554A - A kind of welding method of four sections ceramic metal halogen lamp pole - Google Patents
A kind of welding method of four sections ceramic metal halogen lamp pole Download PDFInfo
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- CN110340554A CN110340554A CN201810225019.4A CN201810225019A CN110340554A CN 110340554 A CN110340554 A CN 110340554A CN 201810225019 A CN201810225019 A CN 201810225019A CN 110340554 A CN110340554 A CN 110340554A
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- Prior art keywords
- ceramal
- welding
- molybdenum
- halogen lamp
- niobium
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K28/00—Welding or cutting not covered by any of the preceding groups, e.g. electrolytic welding
- B23K28/02—Combined welding or cutting procedures or apparatus
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K37/00—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J61/00—Gas-discharge or vapour-discharge lamps
- H01J61/02—Details
- H01J61/04—Electrodes; Screens; Shields
- H01J61/06—Main electrodes
- H01J61/073—Main electrodes for high-pressure discharge lamps
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J9/00—Apparatus or processes specially adapted for the manufacture, installation, removal, maintenance of electric discharge tubes, discharge lamps, or parts thereof; Recovery of material from discharge tubes or lamps
- H01J9/02—Manufacture of electrodes or electrode systems
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J9/00—Apparatus or processes specially adapted for the manufacture, installation, removal, maintenance of electric discharge tubes, discharge lamps, or parts thereof; Recovery of material from discharge tubes or lamps
- H01J9/24—Manufacture or joining of vessels, leading-in conductors or bases
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Laser Beam Processing (AREA)
- Lasers (AREA)
Abstract
The present invention relates to a kind of welding methods of four section ceramic metal halogen lamp poles, and electrode and molybdenum spiral are welded to connect, and further include the welding and the welding step of ceramal and niobium bar of molybdenum spiral and ceramal, and production obtains four section ceramic metal halogen lamp poles.Compared with prior art, the prepared four sections ceramic metal halogen lamp pole weld strength of the present invention and node appearance comply fully with requirement of the client in subsequent assembly, use process.The smooth ceramic sleeve by small-bore of energy, it is not easy to break.
Description
Technical field
The present invention relates to a kind of electrode manufacturing methods, more particularly, to a kind of welding side of four section ceramic metal halogen lamp poles
Method.
Background technique
Ceramic gold-halogen lamp is a kind of more advanced light source, and superb performance such as high photosynthetic efficiency, high colour developing and long-life have been people
Accepted.
The lamp of incandescent lamp and halogen lamp can be uniquely substituted since its high-color rendering and lower colour temperature make
Kind.So small-power ceramic gold-halogen lamp has extremely wide market in this regard, technology also relative maturity.
High-power ceramic Metal halogen lamp equally has extraordinary colour rendering, and photochromic highly stable.Colour temperature between lifetime
Variation is ± 200K, while the sustainment rate of luminous flux is also fine.Light decay of dying of old age can maintain 80% or more, and the golden halogen of general quartz
Lamp has failed to 50%.
Since the work of high-power ceramic Metal halogen lamp is in the case where the ceramic material of high load, hyperbar and good heat preservation performance,
Therefore when lamp changed power amplitude is larger, the colour temperature and light efficiency change rate of corresponding lamp are smaller, can when such as configuring dimming ballast
Realization reliably dims, and the light efficiency of lamp and colour temperature will not generate and big variation.
Because having these good performances, high-power ceramic Metal halogen lamp can be used in stadiums illumination, megastore
Illumination etc. needs the occasion of advanced lighting.On the prosperity road of downtown city using ceramic gold-halogen lamp illumination industry can be improved and
The clarity and comfort level in space, are conducive to vehicle and the safety of the stream of people, conducive to the landscape in city.
It is formerly used for the electrode of small-power ceramic gold-halogen lamp, the structure of design is to be wound with molybdenum spiral in niobium bar front end for one
Thinner molybdenum rod, molybdenum rod front end is then one section thinner of thoriatde-tungsten wire bar, and front end is wound with a few tungsten wires.The electrode of such structure is straight
Diameter can more slightly fill up the sleeve of electric arc tube, but have it is quite flexible, not reason temperature change and make to ceramic sleeve excessive stresses
Crack；This electrode has conductivity good enough, and thermal resistance is larger, is transmitted to ceramic sleeve from eletrode tip or contact conductor
Heat is less, will not cause excessively high heating and influence sealing-in reliability.
However, such design can not be used on high-power ceramic Metal halogen lamp.Niobium bar, molybdenum spiral diameter overstriking after,
Suitable matching can not be reached with ceramic sleeve, occur the case where ceramic case cracking during lighting.
Summary of the invention
It is an object of the present invention to overcome the above-mentioned drawbacks of the prior art and provide a kind of weld strength height, knot
The welding method of good, the not easy to break four section ceramic metal halogen lamp poles of point appearance.
The purpose of the present invention can be achieved through the following technical solutions:
A kind of welding method of four sections ceramic metal halogen lamp pole, electrode and molybdenum spiral are welded to connect, further include molybdenum
The welding step of the welding of spiral and ceramal and ceramal and niobium bar:
(1) welding of ceramal and molybdenum spiral
(1-1) feeding: fixed ceramal and molybdenum spiral are simultaneously sent to designated position；
(1-2) positioning: ceramal with the end face of molybdenum spiral is closely sealed contacts；
(1-3) electric discharge: corona discharge conducts electric current by clamp, generates electricity in ceramal and the contact surface of molybdenum spiral
Thermal resistance；
(1-4) welding: face material melting is combined with each other infiltration, ceramal and molybdenum spiral is linked together, completes
Welding；
(2) welding of ceramal and niobium bar
The bar feeding of (2-1) niobium: niobium bar is sent to designated position and height；
(2-2) ceramal feeding: ceramal and niobium rod end face contact simultaneously clamp；
(2-3) positioning: ceramal and niobium bar are sent to laser emitting position；
(2-4) Laser emission: laser emitter goes out light, and hot spot exists in the centre of ceramal and niobium bar contact surface, laser
Contact surface surface forms round weldering spot, ceramal and niobium bar melt binding, completes welding.
The material of the ceramal is made of the aluminium oxide of 45wt% and the molybdenum of 55wt%, and aluminium oxide is non-conductive material
Material, the ceramal being mixed with molybdenum, electric conductivity are entirely different with metal alloy compositions.In high-power ceramic gold halogen
In lamp, for the material with ceramic sleeve sealing-in, the coefficient of expansion must be close to ceramics, will use in general small-power design
Metal molybdenum.But gap is very between the design diameter of high-power ceramic metal halogen lamp pole sealing-in silk and the design diameter of sleeve
Small, ceramic case cracks during the difference of the coefficient of expansion will lead to subsequent lighting.It therefore, can only be swollen using conductive energy
Swollen coefficient again can be with the closer cermet material of ceramics.But such design, also increased for the welding processing of electrode
Difficulty.
The fusing point of aluminium oxide is 2054 DEG C；The fusing point of molybdenum is 2610 DEG C；The fusing point of niobium is 2468 DEG C.From material property, produce
Product are comprehensively considered for the use of characteristic, production efficiency, have selected different welding manners.
Ensure that two workpiece welded need the material and form tune of the processing to material surface, end face, equipment clamp
Whole, inverter output adjustment achievees the effect that smoothly to weld, and ensure that the welding fastness and welding efficiency of product, appearance
Flatness and straightness are also consistent with imported product.
Also material is surface-treated before step (1-3) is discharged, keeps surface smooth, color is uniform, non-oxidation,
Greasy dirt.Specifically, the roughness on surface is reduced by ball milling, pickling, and keeps the cleannes of material surface, make clamp and material
Expect that direct contact area increases, the loss of energy when reducing welding.The flatness of workpiece is to be welded successfully the factor of most critical.?
Before welding, surface grinding machine grinding processing has been carried out to the end face of cermet material.Ensure material do not have tip, burr, tiltedly
The defects of angle, to be fitted closely in subsequent welding with the end face of molybdenum spiral.
The material of 80% tungsten and 20% copper alloy as clamp is selected, increases wear-resisting effect while ensuring electric conductivity
Fruit.The design of notch under V-type, makes workpiece have 3 point contacts, increases stability of the workpiece in welding.Guarantee the suitable of docking
Benefit carries out.
Inversion direct current resistance spot welding power discharges in step (1-3), with the time precision response of Millisecond and control electric current
Variation, in corona discharge using the output setting of seven segmentations:
The T1 stage: ceramal and molybdenum spiral are clamped using clamp, clamp is mobile to the contact surface of workpiece, makes ceramal
With molybdenum helical contact, phases-time control is 10-15ms；
The T2 stage: clamp continues to center applied force, generates precompressed in ceramal and molybdenum helical interfaces, and make
Pressure is stablized, and phases-time control is 50-55ms, which does not discharge；
The T3 stage: electric current is slowly promoted, and rate control is that 17-20.5A/ms makes the submissive variation of electric current, the phases-time control
It is made as 35-40ms；
The T4 stage: keeping electric current 680-720A, and electrified regulation generates melting between work piece interface, makes work by pressure
Part connection, phases-time control are 90-110ms；
The T5 stage: electric current slowly declines, rate control 22.6-28.2A/ms, reduces cooling velocity, the phases-time control
It is made as 25-30ms；
The T6 stage: keeping 50-55ms, guarantees that molten metal crystallizes cooling under electrode pressure effect, prevents welding tissue
It is loose to cause node brittle；
The T7 stage: stop 10ms, and epicycle welding is completed, and prepares to start next round welding.
The weld of ceramal and molybdenum spiral, node are required to be smooth, are full, is complete, and intensity requirement is high.Therefore selection connects
The electric resistance welding that contacting surface melts completely is welded.Since the current density passed through on the cross-sectional unit area of ceramal is uneven
Even, when butt welding, is easy to appear " spark sputtering " caused by single-point electric current increases suddenly.Due to unevenly leading for cermet material
Electrically, the heat for generating inverter when discharging in node is inconsistent, causes node fastness deviation.
Niobium bar is fixed with lower clamp formwork in step (2-1), is sent to designated position, niobium bar cramp mould is unclamped and positions to specified altitude assignment.
The welding of ceramal and niobium bar, node are located at the outer end of ceramic sleeve, and when light bulb uses, temperature is lower.To knot
The desired strength of point is slightly lower.Therefore the selection higher Laser Welding of production efficiency is welded.
Since niobium and molybdenum are all refractory metals, and the fusing point of aluminium oxide is also very high, it is desirable that the power of laser output is larger.So
And cermet material is a kind of extremely brittle material, therefore has selected the mode of three LASER BEAM WELDINGs.
It is welded in step (2-4) using three laser speed, three laser emitting heads are with 120 degree of angles in same level cloth
It sets, the distance between directional light is 100mm, focal length 100mm.16 groups of continuous impulse waveforms, power 33%, arteries and veins is arranged in laser head
Wide 38ms goes out light in niobium bar and ceramal contact position.
In order to make material be unlikely to the case where generating brittle fracture because heat is excessively high after melting, in 95 volume %N2
With 5 volume %H2Laser welding is carried out under the protective atmosphere of composition.
Compared with prior art, outside the prepared four sections ceramic metal halogen lamp pole of the present invention, weld strength and node
See the requirement for complying fully with client in subsequent assembly, use process.The smooth ceramic sleeve by small-bore of energy, it is not easily broken
It splits.The product has obtained the approval of more clients at present, and four section ceramic gold-halogen lamps can be provided by becoming domestic unique one
The supplier of electrode.
Specific embodiment
The present invention is described in detail combined with specific embodiments below.Following embodiment will be helpful to the technology of this field
Personnel further understand the present invention, but the invention is not limited in any way.It should be pointed out that the ordinary skill of this field
For personnel, without departing from the inventive concept of the premise, various modifications and improvements can be made.These belong to the present invention
Protection scope.
Embodiment 1
For four section ceramic metal halogen lamp poles welding method, electrode and molybdenum spiral are welded to connect, further include with
Lower step:
1, the welding of ceramal and molybdenum spiral:
1) feeding: two kinds of materials are sent to designated position by fixed ceramal and molybdenum spiral；
Using 4.8MM tungsten copper briquetting, using 1.2MMV type groove as lower lock block, rectangle upper holder block clamps workpiece；
Ceramal is clipped in away from the 0.85MM of end face by clamp 1；Clamp 2 is by molybdenum screw clamp at the 1.15MM of end face.
2) position: make ceramal with the end face of molybdenum spiral is closely sealed contacts；
Ceramal feeding is rotated 60 degree by the first clamp, is fixed to horizontal position；Second clamp by molybdenum spiral send to
Ceramal is in the position that a straight line is placed；
Using the pressure spring of precompressed 10N, apply thrust in molybdenum spiral back segment.Make the end face of ceramal and molybdenum spiral is closely sealed to connect
Touching.
3) discharge: corona discharge conducts electric current by clamp.Resistance is generated in ceramal and the contact surface of molybdenum spiral
Heat；
Inverter, weld interval and welding current is arranged according to 7 program segmentations: the output of 7 segmentations is arranged, electric current 680-
720A；
Corona discharge conducts electric current by tungsten copper clamp, generates resistance heat on ceramal and the contact surface of molybdenum spiral；
4) weld: face material melting is combined with each other infiltration, two kinds of materials is linked together, completes welding.
Workpiece end face material is melted since resistance heat generates,
Pre-compressed spring continues to thrust, and the material of contact surface is made to be combined with each other infiltration.The fusant of two kinds of materials is cooling
After solidify, two workpiece are linked together, complete welding.
2, the welding of porcelain alloy and niobium bar
1) niobium bar feeding: using the clamping of " design of tip bottom ", wherein the lower clamp formwork of clamping can be separated to fixed niobium
Bar.Pressure fastening is carried out using the spring of 0.5MM string diameter, 1.5MM screw pitch, 4MM outer diameter, 15MM long.
Niobium bar is sent by track into lower clamp formwork, is clamped afterwards in vertical state.
Niobium bar moves to next station, unclamps lower clamp formwork, niobium bar is positioned to specified altitude assignment, clamps and detects confirmation workpiece.
2) ceramal feeding: the upper clamp formwork separately clamped is to fixed ceramal.It is equally pressed and is fastened with spring.
Ceramal is sent by track to upper clamp formwork, is allowed to and niobium rod end face contact；
Ceramal is adjusted to clamp in same linear state with niobium bar and detect confirmation workpiece.
3) mold positions: mold is sent to laser emitting position.
3 laser emitting heads are arranged with 120 degree of angles in same level, and directional light distance 100mm, focal length are adjusted
100mm；
The qualified workpiece of detection positioning is sent together with mold to 3 outgoing head centers；
Precompressed is carried out to ceramal from weighty slider vertical direction using 5g, does weld preparation.
4) Laser emission: laser emitter goes out light.Laser forms round weldering spot, ceramal and niobium bar on contact surface surface
Melt binding completes welding.
Open protective gas (95 volume %N2With 5 volume %H2) valve；
Three road laser emitting heads are distributed using 600W laser generator, three road laser is taken to be simultaneously emitted by mode；
16 groups of continuous impulse waveforms are set, and power 33%, pulsewidth 38MS go out light in niobium bar and ceramal contact position；
Welding is completed, and pre-pressing slide block is unclamped, and closes protective gas, completes welding.
Ceramal diameter used in the present invention is 1.45MM；The molybdenum spiral core filaments welded therewith be 0.8MM, outside around
Silk is 0.3MM；Niobium shank diameter is 1.4~1.5MM.Four section ceramic metal halogen lamp poles are suitable for 315W ceramic gold-halogen lamp.
Embodiment 2
A kind of welding method of four sections ceramic metal halogen lamp pole, electrode and molybdenum spiral are welded to connect, further include molybdenum
The welding step of the welding of spiral and ceramal and ceramal and niobium bar, wherein the material of ceramal by 45wt% oxygen
Change aluminium and the molybdenum composition of 55wt%:
(1) welding of ceramal and molybdenum spiral
(1-1) feeding: fixed ceramal and molybdenum spiral are simultaneously sent to designated position；
(1-2) positioning: ceramal with the end face of molybdenum spiral is closely sealed contacts；
(1-3) electric discharge: corona discharge conducts electric current by clamp, generates electricity in ceramal and the contact surface of molybdenum spiral
Thermal resistance, using the output setting of seven segmentations when corona discharge:
The T1 stage: ceramal and molybdenum spiral are clamped using clamp, clamp is mobile to the contact surface of workpiece, makes ceramal
With molybdenum helical contact, phases-time control is 10ms；
The T2 stage: clamp continues to center applied force, generates precompressed in ceramal and molybdenum helical interfaces, and make
Pressure is stablized, and phases-time control is 50ms, which does not discharge；
The T3 stage: electric current is slowly promoted, and rate control is that 17A/ms makes the submissive variation of electric current, and phases-time control is
35ms；
The T4 stage: keeping electric current 680A, and electrified regulation generates melting between work piece interface, connects workpiece by pressure
It connects, phases-time control is 90-110ms；
The T5 stage: electric current slowly declines, rate control 22.6A/ms, reduces cooling velocity, and phases-time control is
25ms；
The T6 stage: keeping 50ms, guarantees that molten metal crystallizes cooling under electrode pressure effect, prevents welding tissue looseness
Cause node brittle；
The T7 stage: stop 10ms, and epicycle welding is completed, and prepares to start next round welding；
(1-4) welding: face material melting is combined with each other infiltration, ceramal and molybdenum spiral is linked together, completes
Welding；
(2) welding of ceramal and niobium bar
The bar feeding of (2-1) niobium: fixing niobium bar with lower clamp formwork, send to designated position, unclamps niobium bar cramp mould and positions to specified height
Degree；
(2-2) ceramal feeding: ceramal and niobium rod end face contact simultaneously clamp；
(2-3) positioning: ceramal and niobium bar are sent to laser emitting position；
(2-4) Laser emission: in 95 volume %N2With 5 volume %H2Laser welding, laser hair are carried out under composition protective atmosphere
Emitter goes out light, using three laser speed weld, three laser emitting heads with 120 degree angles same level arrangement, directional light it
Between distance be 100mm, focal length 100mm, laser head be arranged 16 groups of continuous impulse waveforms, power 33%, pulsewidth 38ms, in niobium
Bar and ceramal contact position go out light, and hot spot is in the centre of ceramal and niobium bar contact surface, and laser is in contact surface surface shape
Spot, ceramal and niobium bar melt binding are welded at circle, completes welding.
Embodiment 3
A kind of welding method of four sections ceramic metal halogen lamp pole, electrode and molybdenum spiral are welded to connect, further include molybdenum
The welding step of the welding of spiral and ceramal and ceramal and niobium bar, wherein the material of ceramal by 45wt% oxygen
Change aluminium and the molybdenum composition of 55wt%:
(1) welding of ceramal and molybdenum spiral
(1-1) feeding: fixed ceramal and molybdenum spiral are simultaneously sent to designated position；
(1-2) positioning: ceramal with the end face of molybdenum spiral is closely sealed contacts, and material is surface-treated, control material
Expect that surface is smooth, color is uniform, non-oxidation, greasy dirt；
(1-3) electric discharge: corona discharge conducts electric current by clamp, generates electricity in ceramal and the contact surface of molybdenum spiral
Thermal resistance, using the output setting of seven segmentations when corona discharge:
The T1 stage: ceramal and molybdenum spiral are clamped using clamp, clamp is mobile to the contact surface of workpiece, makes ceramal
With molybdenum helical contact, phases-time control is 12ms；
The T2 stage: clamp continues to center applied force, generates precompressed in ceramal and molybdenum helical interfaces, and make
Pressure is stablized, and phases-time control is 52ms, which does not discharge；
The T3 stage: electric current is slowly promoted, and rate control is that 18A/ms makes the submissive variation of electric current, and phases-time control is
38ms；
The T4 stage: keeping electric current 700A, and electrified regulation generates melting between work piece interface, connects workpiece by pressure
It connects, phases-time control is 100ms；
The T5 stage: electric current slowly declines, rate control 25A/ms, reduces cooling velocity, and phases-time control is
28ms；
The T6 stage: keeping 53ms, guarantees that molten metal crystallizes cooling under electrode pressure effect, prevents welding tissue looseness
Cause node brittle；
The T7 stage: stop 10ms, and epicycle welding is completed, and prepares to start next round welding；
(1-4) welding: face material melting is combined with each other infiltration, ceramal and molybdenum spiral is linked together, completes
Welding；
(2) welding of ceramal and niobium bar
The bar feeding of (2-1) niobium: fixing niobium bar with lower clamp formwork, send to designated position, unclamps niobium bar cramp mould and positions to specified height
Degree；
(2-2) ceramal feeding: ceramal and niobium rod end face contact simultaneously clamp；
(2-3) positioning: ceramal and niobium bar are sent to laser emitting position；
(2-4) Laser emission: in 95 volume %N2With 5 volume %H2Laser welding, laser hair are carried out under composition protective atmosphere
Emitter goes out light, using three laser speed weld, three laser emitting heads with 120 degree angles same level arrangement, directional light it
Between distance be 100mm, focal length 100mm, laser head be arranged 16 groups of continuous impulse waveforms, power 33%, pulsewidth 38ms, in niobium
Bar and ceramal contact position go out light, and hot spot is in the centre of ceramal and niobium bar contact surface, and laser is in contact surface surface shape
Spot, ceramal and niobium bar melt binding are welded at circle, completes welding.
Embodiment 4
A kind of welding method of four sections ceramic metal halogen lamp pole, electrode and molybdenum spiral are welded to connect, further include molybdenum
The welding step of the welding of spiral and ceramal and ceramal and niobium bar, wherein the material of ceramal by 45wt% oxygen
Change aluminium and the molybdenum composition of 55wt%:
(1) welding of ceramal and molybdenum spiral
(1-1) feeding: fixed ceramal and molybdenum spiral are simultaneously sent to designated position；
(1-2) positioning: ceramal with the end face of molybdenum spiral is closely sealed contacts, and material is surface-treated, control material
Expect that surface is smooth, color is uniform, non-oxidation, greasy dirt；
(1-3) electric discharge: corona discharge conducts electric current by clamp, generates electricity in ceramal and the contact surface of molybdenum spiral
Thermal resistance, using the output setting of seven segmentations when corona discharge:
The T1 stage: ceramal and molybdenum spiral are clamped using clamp, clamp is mobile to the contact surface of workpiece, makes ceramal
With molybdenum helical contact, phases-time control is 15ms；
The T2 stage: clamp continues to center applied force, generates precompressed in ceramal and molybdenum helical interfaces, and make
Pressure is stablized, and phases-time control is 55ms, which does not discharge；
The T3 stage: electric current is slowly promoted, and rate control is that 20.5A/ms makes the submissive variation of electric current, and phases-time control is
40ms；
The T4 stage: keeping electric current 720A, and electrified regulation generates melting between work piece interface, connects workpiece by pressure
It connects, phases-time control is 90-110ms；
The T5 stage: electric current slowly declines, rate control 28.2A/ms, reduces cooling velocity, and phases-time control is
30ms；
The T6 stage: keeping 55ms, guarantees that molten metal crystallizes cooling under electrode pressure effect, prevents welding tissue looseness
Cause node brittle；
The T7 stage: stop 10ms, and epicycle welding is completed, and prepares to start next round welding；
(1-4) welding: face material melting is combined with each other infiltration, ceramal and molybdenum spiral is linked together, completes
Welding；
(2) welding of ceramal and niobium bar
The bar feeding of (2-1) niobium: fixing niobium bar with lower clamp formwork, send to designated position, unclamps niobium bar cramp mould and positions to specified height
Degree；
(2-2) ceramal feeding: ceramal and niobium rod end face contact simultaneously clamp；
(2-3) positioning: ceramal and niobium bar are sent to laser emitting position；
(2-4) Laser emission: in 95 volume %N2With 5 volume %H2Laser welding, laser hair are carried out under composition protective atmosphere
Emitter goes out light, using three laser speed weld, three laser emitting heads with 120 degree angles same level arrangement, directional light it
Between distance be 100mm, focal length 100mm, laser head be arranged 16 groups of continuous impulse waveforms, power 33%, pulsewidth 38ms, in niobium
Bar and ceramal contact position go out light, and hot spot is in the centre of ceramal and niobium bar contact surface, and laser is in contact surface surface shape
Spot, ceramal and niobium bar melt binding are welded at circle, completes welding.
Specific embodiments of the present invention are described above.It is to be appreciated that the invention is not limited to above-mentioned
Particular implementation, those skilled in the art can make various deformations or amendments within the scope of the claims, this not shadow
Ring substantive content of the invention.
Claims (8)
1. a kind of welding method of four section ceramic metal halogen lamp poles, electrode and molybdenum spiral are welded to connect, which is characterized in that
Further include the welding and the welding step of ceramal and niobium bar of molybdenum spiral and ceramal:
(1) welding of ceramal and molybdenum spiral
(1-1) feeding: fixed ceramal and molybdenum spiral are simultaneously sent to designated position；
(1-2) positioning: ceramal with the end face of molybdenum spiral is closely sealed contacts；
(1-3) electric discharge: corona discharge conducts electric current by clamp, generates resistance heat in ceramal and the contact surface of molybdenum spiral；
(1-4) welding: face material melting is combined with each other infiltration, ceramal and molybdenum spiral is linked together, completes weldering
It connects；
(2) welding of ceramal and niobium bar
The bar feeding of (2-1) niobium: niobium bar is sent to designated position and height；
(2-2) ceramal feeding: ceramal and niobium rod end face contact simultaneously clamp；
(2-3) positioning: ceramal and niobium bar are sent to laser emitting position；
(2-4) Laser emission: laser emitter goes out light, and hot spot is being contacted in the centre of ceramal and niobium bar contact surface, laser
Face surface forms round weldering spot, ceramal and niobium bar melt binding, completes welding.
2. a kind of welding method of four sections ceramic metal halogen lamp pole according to claim 1, which is characterized in that the pottery
The material of porcelain alloy is made of the aluminium oxide of 45wt% and the molybdenum of 55wt%.
3. a kind of welding method of four sections ceramic metal halogen lamp pole according to claim 1, which is characterized in that in step
(1-3) is also surface-treated material before being discharged, and control material surface is smooth, and color is uniform, non-oxidation, greasy dirt.
4. a kind of welding method of four sections ceramic metal halogen lamp pole according to claim 1, which is characterized in that step (1-
3) in corona discharge using the output setting of seven segmentations:
The T1 stage: ceramal and molybdenum spiral are clamped using clamp, clamp is mobile to the contact surface of workpiece, makes ceramal and molybdenum
Helical contact, phases-time control are 10-15ms；
The T2 stage: clamp continues to center applied force, generates precompressed in ceramal and molybdenum helical interfaces, and make pressure
Stablize, phases-time control is 50-55ms, which does not discharge；
The T3 stage: electric current is slowly promoted, and rate control is that 17-20.5A/ms makes the submissive variation of electric current, and phases-time control is
35-40ms；
The T4 stage: keeping electric current 680-720A, and electrified regulation generates melting between work piece interface, connects workpiece by pressure
It connects, phases-time control is 90-110ms；
The T5 stage: electric current slowly declines, rate control 22.6-28.2A/ms, reduces cooling velocity, and phases-time control is
25-30ms；
The T6 stage: keeping 50-55ms, guarantees that molten metal crystallizes cooling under electrode pressure effect, prevents welding tissue looseness
Cause node brittle；
The T7 stage: stop 10ms, and epicycle welding is completed, and prepares to start next round welding.
5. a kind of welding method of four sections ceramic metal halogen lamp pole according to claim 1, which is characterized in that step (2-
1) niobium bar is fixed with lower clamp formwork in, is sent to designated position, niobium bar cramp mould is unclamped and positions to specified altitude assignment.
6. a kind of welding method of four sections ceramic metal halogen lamp pole according to claim 1, which is characterized in that step (2-
4) welded in using three laser speed, three laser emitting heads with 120 degree angles in same level arrangement, between directional light away from
From for 100mm, focal length 100mm.
7. the welding method of four section ceramic metal halogen lamp pole of one kind according to claim 1 or 6, which is characterized in that step
16 groups of continuous impulse waveforms are arranged in laser head in (2-4), and power 33%, pulsewidth 38ms contact position in niobium bar and ceramal
Set out light.
8. a kind of welding method of four sections ceramic metal halogen lamp pole according to claim 1, which is characterized in that step (2-
4) laser welding is carried out under protective atmosphere, the protective atmosphere is by 95 volume %N2With 5 volume %H2Composition.
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| CN113643249A (en) * | 2021-08-05 | 2021-11-12 | 复旦大学 | Health state generation method and system of road comprehensive rod system |
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| CN110340554B (en) | 2021-09-03 |
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